Slider for slide fasteners



Sept. 24,; 1940. v GVSUNDEACK 2,215,745

SLIDER FOR SLiDE FASTENERS Filed July 19, 1 939 I EFEEEIEEEIEE;

an ya a A INVENTOR. 59 19 @f'ideon Sundlzack 5, BY @Ja.

TTORNEY.

Patented Sept. 24, 1940 UNITED STATES PATENT OFFICE SLIDER FOR SLIDEFASTENERS Pennsylvania Application July 19, 1939, Serial N0. 285,363

10 Claims.

This invention relates to slide fasteners and, in particular, to theprovision of sliders therefor.

It is an object of this invention to provide an improved slider forslide fasteners which is of the automatic or self-locking type and whichis positive in operation, strong, durable, compact, and economical tomanufacture because of its simplicity of construction and the ease withwhich the parts thereof may be assembled.

It is a further object of this invention to providesuch a sliderconstruction wherein the biasingv means, adapted normally to urge thelocking means thereof into engagement with slide fastener elements,comprises an elongated spring member of the leaf, or substantially flat,type.

It is a further object of this invention to provide such a constructionwherein the biasing spring means is of substantial length and where in,in addition to its function in normally resiliently biasing the lockingmeans to locking position, it also provides yielding connection betweenthe locking lug of the slider and the body thereof.

It is a further object of this invention to provide such a constructionwherein the biasing spring means, in addition to performing the aboveenumerated functions, also operates as yielding stop means for limitingmovement of the locking lug of the slider inwardly with respect to thebody. I

It is a further object of this invention to provide such a constructionwherein the biasing spring means operates as yielding stop means forlimiting movement of the locking ,lug both inwardly and outwardly withrespect to the slider body.

It is a further object of this inventiton to provide a sliderconstruction of the utmost simplicity and wherein the biasing springmeans projects from the lower end of the slider upwardly throughout asubstantial proportionof thelength Fig. 3 is a view similar to. Fig. 2but showing.

the slider parts in unlocking position;

Fig. 4 is a transverse section taken substantially on the line 4-4 ofFig. 2

Fig. 5 is a longitudinal section in perspective of the sliderconstruction illustrated in Figs. 1 to 4 inclusive, certain partsthereof being shown in section in the interest of clearness ofdisclosure;

Fig.6 is an enlarged longitudinal section, similar to Fig. 2, of amodified'slider construction according to the principles of thisinvention; and

Fig. 7 is a view similar to Fig. 5 of the modifled form of sliderconstruction illustrated in Fig. 6.

Referring to the drawing in detail, and with reference particularly toFig. 1 wherein, for the purposes of illustration only, I have shown theapplication of my improved slider to an otherwise conventional slidefastener of the non-separating type, the slide fastener stringers aregenerally designated l0 and are secured together at their lower ends bysuitable bottom stop means, generally designated II.. The stringers Illeach comprise a tape or strip l2 of suitable material to which aresecured, in suitable relationship, the fastener members I4 which areadapted for interengagement in known manner to secure the adjacent edgesof the stringers Ill together.

The engagement and disengagement of the fastener membe s H' isaccomplished by longidisposed between their upper ends and integraltherewith. The wedge or web 2| is providedwith inclined exteriorsurfaces disposed between the back and front wings which deflne adownwardly directed V and which cooperate with the marginal side flanges23 on the back wing l9 and the marginal side flanges 24 on the frontwing 20 to form an upwardly diverging substantially Y-shaped, channel25, in which the fastener elements M of the stringers III are guided inknown manner, as shown in Figs. 2, 3. and 4.

While the back wing 19 is of solid construction, as shown, the frontwing 20 is provided with a centrally disposed longitudinal slot 21extending from the outer surface thereof into the channel 25. The sidewalls of this slot are designated 28 and are flat, and at each side ofthe slot 21 is a longitudinal recess 29 (Fig. 1), which is adaptedslidably to receive one furcation |6a of the pull I6, as indicated inthe drawing. Disposed between these recesses 29 at the lower end of thewing 20 is a lug 30 which cooperates with the recesses 29 to guide thefurcations |6a of the pull 6. The upper end wall of the slot 21 isdoubly inclined to form the transverse projection 3| of substantiallytriangular section, which projection cooperates with notch means on thelocking lug to form a hinge connection, as hereinafter most clearlydescribed.

The lower end wall 32 of the slot 21 is flat and slightly inclined, asshown in Figs. 2 and 3. Disposed in the slot 21 is the locking lug 33which is provided with a transverse slot 34 adapted slidably to receivethe pivot projections extending inwardly toward one another from thefurcations |6a of the pull l6.

The upper end wall of the locking lug 33 is provided with a notch 35adapted to cooperate with the above described projection 3| to form ahinge connection between the locking lug 33 and the slider body, asshown in Figs. 2 and 3. The lower end wall of the locking lug 33 isinclined and is substantially parallel with the lower between the lengthof the slot 21 and the length of the locking lug 33 is such that thelocking projection or pin 36 cooperates with the lower end wall 32 ofthe slot 21 to limit pivotal movement outwardly of the locking lug 33with respect to the slider body, as shown in Fig. 3. I

Extending from the lower end of the inner wall of the locking lug 33 isa recess or channel 31 which extends to a point beyond the middle of thelocking lug 33 and which terminates in a transverse notch 38 whichis-slightly inclined upwardly. Received by this channel 31 with itsupper end disposed in the notch 38 is a substantially L-shaged leafspring member 39 which has the short leg 40 thereof disposed atsubstantially ninety degrees to the long leg thereof and secured innotches 4| provided in the above described lug 30.

The spring 39, hereinafter termed the biasing spring, normally urges thelocking lug 33 inwardly of the slider body to the lockingposition-illustrated in Fig. 2. The slider may be unlocked from thestringers H! by manual engagement of the pull tab 8 of thepull I6 topull the locking lug 33 outwardly against the force of the biasingspring 39 to the position shown inFig. 3. In that position, the lockingpin or projection 36 is disposed outside the (channel 25, and thestringers and their fastener memupon the slider |5 will be locked withrespect wto the stringers l6. While only one looking pip the notches 4|are formed subsequent to the formation of a substantially rectangularslot in the wing 20, whereafter the lower or short leg 40 of the biasingspring 39 is positioned in the slot, and the corners of the slot areupset or beaded over upon the leg 40 to secure it rigidly with respectto the wing 26.

If the slider body is formed of plastic material, then the notches 4|are formed subsequent to the formation of arectangular slot in the wing20 by the application of suitable solvent to the corner portions of theslot, which is followed by application of pressure rigidly-to secure theleg portion 40 of the spring 39 with respect to the lug 30.

In order to assemble the slider'illustrated in Figs. 1 to 5, the lockinglug 33 is inserted through the lower end of the channel 25 and thenpushed outwardly substantially to the position shown in Fig. 2. Thepivot projections ll of the pull l6 are snapped into the pull supportingslot 34- in the locking lug 33. The upper end of the long leg of thebiasing spring 39 is inserted in the notch 38 in the locking lug 33, andthe'short leg portion 40 of the biasing spring 39 is secured to the lug30 of the slider body by the formation of the notches 4| by the abovedescribed procedure. The slider is then assembled and ready for use inslide fasteners of various knowntypes and constructions.

In the modification illustrated in Figs. 6 and 7, the details of thepull 16 are unchanged. The slider body, designated |5a is, however,somewhat modified. The back wing Illa of the slider body I50, and alsothe wedge or'wedge-forming web 2|a are similar to corresponding parts ofthe slider body l5, illustrated in Figs. 1 to 5. The front wing 26a,however, is somewhat modified. This front wing 26a is provided withmarginal side flanges 24a, corresponding with marginal side flanges 24of the above described front wing 20. These marginal side flanges 24acooperate with marginal flanges 23a of the back wing I911, correspondingwith the above described marginal side flanges 23, and with the wedge orwedgeforming web 2|a to form between the'wings I91; and' 20 a channel25a, corresponding with the above described channel 25.

end wall 32a, and upper e d wall forming a projection 3|a, allcorresponding with analogous parts of the construction of Figs. 1 to 5.Atv

each side of the slot 21a are recesses 29a, corresponding to recesses 2901 the construction ofFigs. lto 5. I

The lug 30a, which corresponds to the lug 30, is somewhat modified,being provided with a longitudinal bore 4|a instead of the notches 4|.

The bore 4 la is substantially cylindrical but provided at oppositesideswith'grooves adapted to receive keys or feathers provided on thelower or outer, thickened, substantially cylindrical end 4011 of themodified biasing spring 39a. The innor end portion of the biasing spring39a which extends beyond the lug a is flattened, as shown in Figs. 6 and'7. This biasing spring 39a is substantially flat or straight, and likethe biasing spring 39, is of substantial extent, extending substantiallyto the upper end of the modified locking lug 33a.

The modified locking lug 33a, corresponding to the locking lug 33 of theconstruction of Figs. 1 to 5, is provided at its upper end with a notch35a, corresponding to the above described notch 35 and cooperating withthe projection 3 la formed by the upper end wall of the sclot 21a toprovide a hinged or pivotal connection between the locking lug 33a -an'dthe slider body. At its lower end, the locking lug 33a is provided witha locking projection of pin 36a, corresponding to the locking pin 36.The lower end portion of the locking lug 33a differs from thecorresponding portion of the above described locking lug 33 only in theomission of the channel 31 and notch 38 and in the provision of anaperture 43a through which the biasing spring 33a is adapted to project,as shown in Figs. 5 and 6. Thisaperture 43a communicates with a channela, which is in the lid form of a recess extending downwardly from thelower inner surface of the pull supporting slot 34a, which correspondsto the slot 34 in the above described locking ing 33. This channel orrecess 44a is curved, as shown in Fig. 6. This curvature and the lengthof the aperture 43a makes the functioning of the biasing spring 39a, incooperation with the aperture 431:, as a resilient stop means forlimiting the pivotal movement of the locking lug 33a with respect to thebody of the slider, both inwardly (Fig. 6) and outwardly (Fig. 7) tolocking and unlocking positions respectively.

The slider assembly illustrated in Figs. 6 and '7 I may be assembledwith extreme ease and convenience. In order to assemble the pull,locking lug, and biasing spring to the slider body, it is merelynecessary to insert the locking lug through the lower end of the channel25a in the slider body to position below the slot 21a, thrust thelocking lug 33a outwardly to the position of Fig. 6, snap the pivotprojections I I of the pull l5 into the slot 34a, and then insert thebiasing spring 39a endwise through the bore Ila in the lug 30a to theposition of Fig. 6. If the parts are formed of plastic, the frictionalattachment of the spring 39a may be accompanied bya bonding achieved bythe application of solvent either to the interior of the bore 4la beforeinsertion of the spring end portion a or by application of solventdirectly to the end portion 40a of the spring before its insertion inthebore.

If the slider body be formed of metal, then the frictional attachmentmay be emphasized by upsetting the metal adjacent the outer end of thebore Ma.

From the above description, it will be seen that the constructionsherein illustrated and described embody various advantages over knownprior art structures, which include the use of a long biasing spring,compactness, and extreme ease and convenience of assemblage, whichlatter feature materially decreases the cost of manufacture.

It is, of course, to be understood that the above described structure ismerely illustrative and in no wise limiting and that I desire tocomprehend within my invention all modifications included within thescope of the appended claims.

having a fastener member receiving channel therein and having alongitudinal locking lug receiving slot in one side thereofcommunicating with said channel, a locking lug in said slot havingpivotal connection with said body at one end of said slot, said lockinglug having thereon looking pin means engageable with fastener members insaid channel in the locking position of said locking lug, and a flatleaf spring disposed substantially longitudinally of said body andhaving one end thereof rigidly secured to said body adjacent theopposite end of said slot, said leaf spring having the other end thereofengaging said locking lug for normally resiliently urging said lockinglug to locking position.

2. In a slider as defined in claim 1, said locking lug having herein alongitudinal slot, and a bifurcated pull member having pivotalprojections slidably and pivotally supported in said longitudinal slot,said pull member being manually engageable for withdrawing said lockinglug from locking position, against the yielding force of said leafspring.

3. In a slider as defined in claim 1, said locking lug having therein alongitudinal slot, and a bufurcated pull member having pivotalprojections slidabiy and pivotally supported in said longitudinal slot,said pull member being manually engageable for withdrawing said lockinglug from looking position, against the yielding force of said leafspring, and said slider body having re-' cesses at opposite sides ofsaid locking lug receiving slot for recessing said pull member in saidslider body in the fiat position of said pull member and cooperatingwith said pull member positively to limit inward movement of saidlocking lug to locking position.

4. In a slider for slide fasteners, a slider body having a fastenermember receiving channel therein and having a longitudinal locking lugreceiving slot in one side thereof communicating with said channel, saidlocking lug receiving slot having the upper end thereof doubly inclinedto form a projection, a locking lug in said slot having the upperendthereof provided with a notch complementary with the projection in theend of said locking lug receiving slot, said locking lug havingv lockingpin means at the lower end thereof engageable with fastener members insaid channel in the locking position of said locking lug, and a flatleaf spring having the lcwer end thereof secured rigidly to said bodyadjacent, the lower end of said locking lug receiving slot and havingthe upper end thereof engaging said locking lug for normally yield- 1.In a slider for slide fasteners, a slider body ingly urging said lockinglug to locking position and forming yieldable stop means for delimitingthe locking position of said locking lug.

5. In a slider for slide fasteners, a slider body having a fastenermember receiving channel therein and having a longitudinal locking lugreceiving slot in one side thereof communicating with said channel,saidlocking lug receiving slot having the upper end thereof engagingsaid locking lug for normally yieldingly urging said looking lug tolocking position and forming yieldable stop means for delimiting thelocking position of said locking lug, said leaf spring cooperating withsaid locking lug yieldably to limit outward movement of said locking lugto define the unlocked position thereof.

6. In aslider for slide fasteners decribed, a slider body having a slidefastener member receiving channel therein, and a longitudinal lockinglug receiving slot extending from one side of said body to said channel,a locking lug in such slot having hinged connection with said body atone end of said slot, said locking lug having therein a notch opentoward the 'opposite end of said slot, and a leaf spring memher rigidlysecured to said body at one end and having the opposite end thereofdisposed in said notch.

'7. In a slider for slide fasteners of the class described, a sliderbody having a slide fastener member receiving channel therein and alongitudinal locking lug receiving slot extending from one side of saidbody to said channel, a locking lug in said slot having hingedconnection with said body at the upper end of said slot, said lockinglug having therein a longitudinal pull receiving slot with an apertureatthe lower end thereof, and a leaf spring member having one end rigidlysecured to said body adjacent the lower end of said locking lugreceiving slot, said leaf spring member projecting through theaperturein said locking lug and having the upper end thereof in engagement witha wall of said pull member receiving slot.

8. In a slider for slide fasteners of the class described, a slider bodyhaving a slide fastener member receiving channel therein and alongitudinal locking lug receiving slot extending from one side of saidbody to said channel, a locking lug in said slot having hingedconnection with said body at the upper end of said slot, said lockinglug having therein a longitudinal pull receiving slot with an apertureat the lower end of the class thereof, and aleaf spring member havingone end rigidly secured to said body adjacent the lower end of saidlocking lug receiving slot, said gitudinal locking lug receiving slot inone side thereof communicating with said channel, said locking lugreceiving slot having a projection formed in one end thereof, a lockinglug in said slot having a notch at one end engageable with saidprojection for providing interlocking pivotal connection betweensaid'lockinglug andsaid body, and leaf spring means rigidly secured tosaid slider body at the opposite end of said looking lug receiving slotand cooperating with said locking lug to maintain said notch in engage-,

ment with said projection while normally yield ingly urging said lockinglug to locking position and limiting movement thereof toward lockingposition. I

10. In a slider for slidev fasteners of the class described, a sliderbody having a slide fastener member receiving channel therein and alocking lug receiving slot disposed longitudinally with respect to saidslider body and extending from one side of said body into said channel,a locking lug of substantially the same length as said slot supportedmovably in said slot for engagement with said fastener members in saidchannel and for disengagement therefrom, and- -a spring member havingone end fixed to said body and having the free end thereof engaging saidlocking lug for normallybiasing said lug toward engagement with slidefastener members in said slide fastener member receiving channel.

GIDEON SUNDBACK.

